Battery Technology
- Sodium-ion batteries — CATL's 280 Ah LFP cells hit ~160 Wh/kg in production, shipping to grid storage. Sodium is 1000× more abundant than lithium (IRENA data).
- Lithium constraints — despite cost declines, supply-chain bottlenecks for refined lithium remain a constraint that sodium-ion directly addresses.
Green Hydrogen
- Cost parity — green hydrogen hit below $5/kg in commercial-scale projects for the first time (IRENA 2025), driven by cheaper electrolyzers (down 60% since 2020) and ultra-cheap renewables.
- Fossil H₂ comparison — cost parity with fossil-derived hydrogen marks the inflection point where green H₂ can compete without subsidies in prime locations.
Wind Energy
- Onshore wind — $28.9/MWh, cheaper than new coal anywhere (NREL data). The economics are solved; deployment speed and grid integration are the real bottlenecks.
- Offshore wind — costs fell 10% in 2024 (IEA), but Europe's expansion stalled amid grid bottlenecks. Floating offshore remains 2-3× fixed-foundation cost.
Carbon Capture (DAC)
DAC costs vary dramatically by region due to energy costs, carbon pricing, and available subsidies. The global baseline is misleading — the real story is in the regional differentials.
Key finding: US projects benefit from 45Q tax credit ($180/ton initial, $176/ton post-EOR), EU projects have access to ETS carbon pricing (€70-90/ton), while China's state-subsidized "CarbonBox" platform aims for sub-$100/ton through manufacturing scale.
| Region | DAC Cost ($/ton) | Effective Cost w/ Incentives | Key Driver |
|---|---|---|---|
| United States (45Q eligible) | $300-500 | $120-320 | $180 tax credit for permanent sequestration |
| EU (ETS regions) | $350-600 | $260-510 | ETS carbon price €70-90/ton; state aid frameworks emerging |
| Iceland/Nordics (geothermal power) | $200-400 | $130-330 | Nearly free waste heat + zero-carbon electricity for stripping process |
| China (state-subsidized CarbonBox) | $100-200 (target) | $50-100 | Manufacturing scale + state R&D; still pre-commercial validation |
| Middle East (solar + EOR) | $40-70 (EOR offset) | $0 (if EOR sold) | Negative cost when CO₂ is sold for enhanced oil recovery in mature fields |
The economics are highly location-dependent. Iceland's Orca/Mammoth plants get near-free geothermal waste heat for the sorbent regeneration step (the most energy-intensive part of liquid DAC), but that advantage doesn't transfer to regions without access to cheap geothermal energy. This is why most cost projections for global scalability overestimate how broadly those conditions apply.
Wikipedia: Direct air capture — comprehensive facility list and technology breakdowns across all commercial DAC operators (Climeworks, Carbon Engineering, Heirloom, etc.).
Sources cited above are primary: IRENA, IEA, NREL, UNEP, and peer-reviewed journals. When industry claims lack transparent methodology, uncertainty is noted explicitly.